<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="./css/base.css">
<script src="./js/codergege.js"></script>
<script src="./js/3.js"></script>
<style>
#menu { width: 100px; height: 200px; background: red; display: none; }
</style>
</head>
<body>
<input type="button" value="按钮">
<div id="menu"></div>
</body>
</html>
